Systemic Insecticides in Animals, by FREDERICK W. PLAPP,JR., WILLIAM F. 
CHAMBERLAIN, and R: D. ISU) Dy) Gl Ds) Fal Poe a GOGO AON COR OOOCOSDOOOSOOSOO0OOObRDSOb00000000 160 
Herbicides in Soils, by Ti. dis SHEETS and 1 ee DANTE LSONidsacessce cesses cicsicccioces 170 
Growth Regulators and Therapeutants...Their Absorption, Translocation, and 
Metabolism in Plants, by JOHN W. MITCHELL, PAUL J. LINDER, and 
BERNARD (Ga SIMUATEES ee icieciclesciocicis oaiclectola ec ieleiaie cleicie siete oieiovstaieiaisiatlsisleis cicleloinseieieie clclcrsisinoicictociocioras 181 
Residues in Milk from Antibiotics Used in Mastitis Treatment, by RICHARD W, 
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Antibiotics, Hormones, and Tranquilizers in Animals, by J. F. SYKES, J. W. 
204 
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